reading text file in matlab

Hi,

I want to read the following in matlab.

Each row has 4 columns: 1 for time, and the other three columns corresponding to the 3 velocity components (within brackets) at 3 locations.

Time (U1x U1y U1z) (U2x U2y U2z) (U3x U3y U3z)

I want each value in a column matrix.

How can textread/dlmread be used to obtain the matrices? Any inputs are welcome!

sample data:

3.99968e-06 (2.05399e-13 -3.88282e-12 0) (5.24149e-11 -6.83701e-05 0) (3.34559e-13 -9.11144e-10 0)

7.99936e-06 (5.10739e-13 -1.17757e-11 0) (1.92955e-10 -9.22845e-05 0) (6.46889e-13 -1.60874e-09 0)

1.1999e-05 (8.09403e-13 -3.2686e-11 0) (4.97752e-10 -8.93228e-05 0) (8.33059e-13 -1.80362e-09 0)

1.59987e-05 (8.01e-13 -1.1137e-10 0) (9.14563e-10 -8.64096e-05 0) (8.4271e-13 -1.57685e-09 0)

1.99984e-05 (2.44508e-13 -4.59938e-10 0) (1.25501e-09 -8.80288e-05 0) (7.85553e-13 -1.18146e-09 0)

2.39981e-05 (-9.16588e-13 -1.97538e-09 0) (1.30702e-09 -9.00981e-05 0) (7.69317e-13 -8.37674e-10 0)

2.79978e-05 (-2.30847e-12 -7.86093e-09 0) (1.06111e-09 -9.10861e-05 0) (9.24744e-13 -6.81356e-10 0)

3.19974e-05 (-2.5133e-12 -2.76676e-08 0) (7.65202e-10 -9.15626e-05 0) (1.28747e-12 -7.55801e-10 0)

3.59971e-05 (5.19913e-13 -8.56329e-08 0) (7.20285e-10 -9.19932e-05 0) (1.84566e-12 -1.00681e-09 0)

3.99968e-05 (9.39936e-12 -2.34462e-07 0) (9.94357e-10 -9.2398e-05 0) (2.47688e-12 -1.30693e-09 0)

Answer 1

[Walter Roberson]

If you use textscan(), you can set Whitespace to include the '(' and ')' characters, and then it would be a plain format of repmat('%f',1,10)

[amit kumar]

Thanks!

Answer 2

[TAB]

These are the steps 1. Read the text line by line 2. Remove '(' & ')' from each line 3. Arrange the lines in matrix expression form by concatination like [1 2 3; 4 5 6; 7 8 9;....] 4. Evaluate the string

Refer the below code...

f=fopen('SampleData.txt','r'); % open file 
% collect the text in cell array seperated by \n
textcellarray=textscan(f,'%s','delimiter','\n'); 
MatrixStr='';
for i=1:length(textcellarray{1})
    if(~isempty(textcellarray{1}{i}))
        textline=strrep(textcellarray{1}{i},'(',''); % remove '('
        textline=strrep(textline,')','');    % remove ')'
        % Concatinate the lines as matrix expression
        MatrixStr=strcat(MatrixStr,textline,';');
    end
end
% Evaluate the matrix expression
FinalMatrix=eval(strcat('[',MatrixStr,']'));

[amit kumar]

Thanks!